Tire-valve.



J. A. sowmgw.

TIRE VALVE. APPLICATION FILED OCT- 21, I912- RENEWED DEC. I8. 1914.

Patented Mar. 7, 1916. I

Ill

v UNITED STATES PATENT OFFICE.

. JUNIUS A. IBOWDEN, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO A.SCHRADERS SON,

INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

- TIRE-VALVE.

Specification of Letters Patent.

Application filed October 21, 1912, Serial No. 727,082. Renewed December18, 1914. Serial No. 877,975.

To all whom it may concern:

Be it known that I, JUNIUS A. BOWDEN, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented a new and useful Tire-Valve, of which thefollowing is a specification.

This invention'relates to a valve adapted for use on pneumatic tires,and the obj ect of the improvement is to provide a valve .with

less inner parts and so constructed that they will not stick from longstanding, and to provide an inner valve mechanism that will neverrequire renewing on account of air leaks it not being the intention ofstopping air from escaping through the valve. In other Words, the objectis to provide a valve that is not airtight,'but that will permit a slowoutward leak and a valve mechanism that will easily open wide inwardly,for the purpose of inflating or deflating the tire. The object inproducing the slow outward leak is to provide for admitting air topressure gages which may be applied to the valve stem for indicating thepressure of air within the tire.

One of the essential features of the invention is to provide a cap thatwill positively close oil the air, this air cap to be removed when apressure gage is applied and to so construct the cap that an airtightjoint is formed which is not subject to impairment by defacement of theexterior surface of the inlet passages to the valve, which'impairment isnow prevalent on tire valves in universal use. I

A further advantage is gained by locating the outer air closure withinthe stem in that the closure area is much less than when at the outerend.

Another object is to provide a greater free air passage for inflationwithout increasing the size of the standard tire valve or body now inuniversal use.

Another object is to provide for attaching both kinds of air pressuregages, to-wit, one that is momentarily pressed against the tire valveand pressure noted, and one that is permanently attached, so that ineither case no manipulation of the inner valve is necessary to secureair communication from the tire to the gage. In accomplishing thispurpose and adapting the universal tire valve body, I provide a novelplan of securing an increased air passage without appreciably tion ofsaid bore is internally weakening the strength of the metal in the smallpart of the regular valve stem which Patented Mar. '7, 1916.

1s reduced in diameter at the point of attachment to the inner tube ofthe tire and which, in my device, contains a part of the inner valvemechanism.

Further objects and advantages will be brought out in the followingdescription.

Referring to the drawings: Figure 1 is a longitudinal section throughthe device. Fig. 2 is a section on line m w Fig. 1. Fig.3 is a sectionon line m a2 Fig. 1. Fig. 4 is .a perspective of the retaining sleeve.Fig 5 is an enlarged longitudinal section of the cap portion of themechanism.

1 designates the valve stem which externally is of the dimensions andshape now in universal use and externally threaded at 2 and with areduced end portion 3 externally threaded. At the inner end the stem 1has a reduced neck 4 to receive the inner tube. Ordinarily the innervalve mechanism is located within the outer portion of the valve stem 1,but in, the present case as will be seen, this would not permit of theemployment of the cap mechanism herein shown, and for that reason Ilocate the inner valve at the inner-end of the valve stem, and yetprovide an operative connection whereby the inner valve may be operatedfrom a point at the outer end of the valve stem, substantially as in theordinary form now in use.

Extending in the main portion of the stem 1 is the central air conduit5. which is of the size now generally in use. The inner end of the valvestem is bored out with a central passage or chamber 6 of slightly largerdiameter than the conduit 55., forming a shoulder or valve seat 7, andthe outer porthrea-ded for a short distance to receive a nut 8 which isbored centrally to slidably receive the inner pin 9 of a valve 10, thelatter having a conical face adapted to seat against the shoulderresistance to the inward movement of air when the mner tlre 1s belnginflated, which thereby renders the inflation much easier than in theordinary valve now in use. The nut 8 acts as a guide for the inner pin 9andas an abutment for the spring 11, and

:in order to form a passage for air past this -"nut, I provide two airpassages 12, each semicircular in cross section as clearly shown in Fig.2, and which extend inwardly as far as the shoulder 7. By forming thetwo air passages 12 in this manner, I secure a large air carryingcapacity for carrying air past the nut' 8 and without materiallyweakening the reduced neck 4. Extending from the valve stem and carriesa hollow pin 16 which has a reduced neck 17 journaled in the cap 15 witha head 18 which permanently retains the pin on the cap. The inner endofthe hollow pin is beveled, as. shown. The hollow pin 16 receives theouter end of the pin 14, loosely. The reduced portion 3 of the valvestem is bored with a larger diameter than the air conduit 5, to form ashoulder 19 pn which is a yielding valve seat 20 formed of any desiredmaterial, as, for example, hard fiber. This valve seat is retained inposition by a lining sleeve 21 which enables the valve seat 20 to beremoved and replaced should it "be desired. The beveled inner end of thehollow pin 16 seats against the inner edge of the-seat 20 when the cap15 is screwed down and thusforms an airtight closure which preventsleakage of air, it being understood that there is desi nedly a leakagefrom the inner valve 10, this leakage being utilized for the operationof pressure gages and necessitating cooperation of the outer valve toform the normal airtight joint condition of the valve mechanism.

- The seat 19 being located at a considerable distance within the end ofthe valve stem is entirely protected and can not be defaced.

It will, therefore. not require replacement and the closure will be moreperfect on account of the perfect valve seat which will be maintained atall times. Furthermore, the small area of the end of the pin 16 makes itmuch easier to produce a perfect fit of the closure parts with resultingnon-leakage of air.

A material advantage is the greater ease of inflation attained by thisconstruction by virtue of the easier opening valve 10 and of theenlarged air passages. While ordinarily y it is a simple matter toincrease the size of an 'air passage to facilitatethe passage of air,such is not the case in the present instance, as to do so would soweaken the contracted neck of the valve stem that it would bepractically unfit for actual service, and for this reason the uniqueconstruction which I have provided is of great value in that althoughthe increased air passage area is secured, the valve stem is notweakened thereby. For example, the passage 5 in my present constructionis the same as the corresponding air passage in the valve now inuniversal use, for example, 3/32nds of an inch. The pin 13 of my valveis substantially 3/64ths which is the same size as the corresponding pinin the valve in universal use. But in the valve in universal use, thepassagecorresponding to my passage 5 is closed by a valve seat member,which member has a reduced passage of less area than my passage 5,through which the pin corresponding to pin 13 passes, and which has aless area of air passage surrounding its pin than my air passage 5, thereduced air passage in said valve in universal use being substantially 564ths of n inch in diameter. Thus, the efi'ective net area in my deviceis .00517 squareinch, while in the valve referred to, the efi'ectivediameter of air passage is the dilference of hole area of 5/64ths inchequal .00468 square inch and pin area of 3/64ths inch diameter equal.00173 square inch area, thus making a. net area of air passage of.00295 square inch. Thus my construction giving .00517 and the othergiving .00295 shows my construction to give .00222 square inch greaterarea, an area which is approximately greater.

What I claim is:

1. A tire valve comprising a stem a pin extending the entire length of.sai stem, said stem having a longitudinal air passage in which said inlies, and a valve in the inner end of said stem carried by said pin,

said pin having a coil formed therein and bearing against the wall ofthe air passage 7 to guide the outer end of the pin.

2. A tire valve comprising a valve stem having a longitudinal airpassage, the inner 3. A tire valve comprising a stem formed 1 with areduced neck in its inner end for the attachment to the air tube of thetire, said stem having a longitudinal air passage throughout its lengthand also having an enlarged bore in the said reduced neck and having aneccentrically located air passage in the said reduced neck counicatingward said inner end, a

withthe enlarged bore, a sleeve screwed in the enlarged bore, therebeing a valve seat formed at the end of the enlarged bore, va valve onsaid seat, a pin slidable in said sleeve and carrying said valve, and aspring between said sleeve and valve.

4. A tire valvecomprislng a stem',a valve neck which extends throughsaid cap, and

a head on the end of said neck outside the cap.

5. A tire valve comprising a valve stem, a

valve in the inner end thereof opening tospring closing said valve, apin extending from said valve to the outer endof the stem, the stemhaving a longitudinal -air passagem which the pin lies, theouter end ofthe stem having an enlarged bore, a valve seat formed of yielding,material at the inner end of the enlarged bore,

the outer end of the valve stem being e'xternally threaded, a capscrewed ..on the outer end of the valve stem, a hollowvpin revolublycarried by said cap and with a beveled inner end ing material, saidhollow outer end of the first pin.

In combination, a stem for pneumatic tires, a valve in the stem, a pinextending from said valve to substantially the outer end of the stem, acap screwed to the outer end of the stem, a hollow in carriedby said capand slidably receiving the outer end of .the first pin, the outer end ofthe valve Stem having an inner seat formed of yielding material securedon said shoulder independently of the hollow pm, the'end of the hollowpin bein adapted to r againstsaid seat screwed down.

'7. tire valve com rising a stem, a valve therein, a pin extending fromsaid valve to substantially the outermost end of the stem, i-

inner end of the en-- seat of yielding ma-u terior swiveled to its basean tactwith said seat'and close said bore, said tubular pro ectingportion I receive the seated against said yield pin receiving theannular shoulder, a flat ng pin of a valve.

hand at when-t e cap is I,

a In presence ofa cap screwed to the outer end of the stem, a hollow pincarried by said cap and slidably receiving the outer end of the firstpin, the hollow pin being closed at one end, and the said closed endextending through the head of the cap and swiveled thereon. 8. A valvestem I ing an enlarged opening in the outer end thereof formingashoulder, a valve seat on said shoulder and a lining sleeve slidablyfitting and frictionally engaging the inner wall of the enlarged openingand bearing constantly hold the seat against the seat to in place inairtight engagement with said shoulder.

. 9. In a tire therein opening toward the inner end of the stem, a solidpin extending from said valve to the outer end of the stem, the outerend of the stem having an enlarged bore, a seat ofyielding material atthe inner end of the enlarged bore, a sleeve in said enlarged boreadapted to hold said yielding material in a valve, a valve stem, avalvefor pneumatic tires havpermanent position at the inner end of theenlarged bore, a cap screwed to the outer -;end of the valve stem, ahollow pin carried by said cap, the hollow pin adapted to slidablyreceive the solid 10. In a tire valve, a body having an inpm, the innerendof the hollow pin adapted to seat against said yielding material.

bore, a valve seat therein, a hollow.

cap having a tubular grojecting portion adapted to conbeing adapted todeflating pin of a valve.

11. In a tire valve, a body having an interior bore, a valve seatthereina hollow screw-threaded cap, haying "a tubular projecting' portionswiveled; to its base and ada ted to contactwith said seat and close saibore said cap being unlimited by said J valve yin the movement ofits'projec tion a instsaid-seat, said tubular projectingportion beingadapted to receive the detestimony whereof I have hereunto set LosAngeles, California,- this 12-day of October, 1912.

J'UNIUS a Bowman.

Gnonon T. Hscxnnr, MARTHA M. Luzon.

